Theoretical Studies of Excess Electron States in Liquids

Abstract

AbstractIn this paper an attempt will be made to review the current state of the art in our understanding of excess electron states in non polar and polar liquids, with an emphasis on the following problems: The nature of quasi free and localized excess electron states. Localization criteria. Energetic stability of the localized excess electron state. Nature of electron solvent interactions. Configurational charges in the medium. A brief survey of excess electron states in non polar solvents such as He, Ar, Kr, Xe, H2, and D2 will focus attention on the general stability problem of an excess electron in a non polar dense fluid, configurational diagrams in ground and excited states, optical properties and non radiative relaxation processes. The basic problems involved are identical with those encountered in the study of excess electron states in polar solvents.Excess electron states in polar solvents will be handled by the application of continuum and molecular models. Information will be presented concerning the quasi free excess electron state in polar solvents, the electronic and medium rearrangement energy for the cavity model, the configurational stability of ground and excited state, configurational diagrams, optical properties, optical lineshapes and relaxation phenomena.